JPS585685Y2 - Portable temporary road bridge - Google Patents

Description

[Detailed description of the invention] This invention relates to a portable temporary road bridge used for repairing highways, especially elevated road bridges in cities, or for other purposes.

When repairing highways, especially elevated highway bridges in cities, long-term road closures have a major impact, so detours are usually provided, but detours are not possible due to surrounding conditions. There are many things like that.

As a countermeasure to this problem, a temporary road is set up to go over the repaired part of the road bridge to ensure a passage for cars while repairing the road bridge. In order to minimize the time of road closure during construction, there is a need for a temporary road bridge that is easily movable and erectable, and whose weight and dimensions during transportation are within limits.

The object of this invention is to provide a portable temporary road bridge having a structure that satisfies the above-mentioned requirements.

Next, this invention will be explained in detail using illustrated examples.

1 to 14 show an embodiment of the present invention, in which a pair of left and right road slabs 1.2 each consisting of a rectangular slab extending in the front-rear direction, that is, the longitudinal direction of the road, is connected to a metal road surface board 11. and a large number of metal horizontal ribs 12 fixed to its lower surface.
The inner ends of each of the road slabs 1 and 2 are pivotally connected by a horizontal shaft 3 extending in the front-rear direction, thereby forming a foldable temporary road slab 4.

The outer ends of the road slabs 1 and 2 are pivoted by a horizontal shaft 7 extending in the longitudinal direction to a bracket 13 fixed to the upper inner surface of the left and right portable main beams 5.6 extending in the longitudinal direction; The intermediate lower part of each road slab 1, 2 in the width direction and the lower part of each main beam 5, 6 are connected via a vertical expansion jack 8 consisting of a hydraulic cylinder device, and furthermore, each main beam 5,
The outer ends of a pair of left and right links 9 are pivotally attached to the front and rear parts of the lower part of the link 6 by a vertical shaft 15, and each link 9
The inner ends of are interconnected by a longitudinal shaft 16.

The middle part of each link 9 and the lower part of each main beam 5, 6 are horizontal expansion jacks 10 consisting of a nearly horizontal hydraulic cylinder device.
, and at the inner end of each link 9 there are locking holes 17 that coincide with each other when the main beam spacing is at its maximum.
A foldable temporary road slab 4 is provided on the inner end side of the horizontal rib 12 in each of the road slabs 1 and 2.
locking holes 19 that coincide with each other when unfolded in a horizontal state;
20 are provided.

Inside the front end and rear end of each main beam 5, 6, a cylinder of a telescoping support leg 21 consisting of a hydraulic cylinder device is housed and fixed, and a pressure platen is provided at the lower end of the piston rod of the telescoping support leg 21. 22 is fixed, and the foldable temporary road slab 4 is folded to form each main beam 5.
, 6 are in the approach position, the front end of each main beam 5, 6 is placed on the common front truck 23, and the rear end of each main beam 5, 6 is placed on the common rear truck 24. The main beams 5, 6 and each truck 23.24 are removably fixed with bolts 25, and each truck 23.24 is equipped with four casters 26, and the front truck 23 is A connecting piece 28 having a locking hole 27 is provided.

Next, a case will be described in which the portable temporary road bridge of the above embodiment is used.

First, the connecting piece 28 of the front truck 23 was connected to the tow fitting 30 of the trailer 29 with a bolt or pin 31, and then the folded portable temporary road bridge was towed and transported to a predetermined position on the road bridge 32 by the trailer 29. Later, one of the main beams 5, the front bogie 23 and the rear bogie 2
4 and extend the telescoping support leg 21 attached to one of the main beams 5 to press the platen 22 against the road surface of the road bridge 32. It is supported by an attached telescoping support leg 21.

Next, by extending the vertical expansion jack 8 and the horizontal expansion jack 10, the other main beam 6 is connected to each carriage 23.
24 and laterally move it in a direction away from the one main beam 5 to unfold the foldable temporary road slab 4 in a horizontal state, and then open the opposite ends of each road slab 1 and 20 in the foldable temporary road slab 4. The locking holes 19 and 20
The inner ends of the left and right links 9 are fixed by bolts or pins 34 inserted across the locking holes 17 and 18.

Next, by extending the telescoping support leg 21 attached to the other main beam 6, the pressure platen 22 at the lower end of the telescoping support leg 21 is brought into pressure contact with the road surface of the road bridge 32, and the main beam 6 is attached to it. After being supported by the telescopic supporting legs 21, each of the carts 23, 24 is removed, and then each of the telescopic supporting legs 21 is extended or shortened as necessary to adjust the level of each main beam 5, 6.

If necessary, a large number of place engagement members 35 are fixed to the upper and lower inner surfaces of the main beams 5 and 6, as shown by chain lines in FIG. Each main beam 5 by place 37 with buckle 36
, 6 may be connected to increase the rigidity of the temporary road bridge.

In the case of the above-described embodiment, the main beam spacing is expanded by extending the expansion horizontal jack 10, but conversely, the main beam spacing is increased by shortening the expansion horizontal jack 10. It may be configured to expand.

Further, the telescoping support leg 21 may be provided at the intermediate portion of the main beams 5, 6, and independent carts may be attached to the front and rear ends of each of the main beams 5, 6 by bolts or clamps.

Figures 13 and 14 show a state in which a portable temporary road bridge has been added to the approach section.

Figures 15 to 17 show a portable temporary road bridge in the approach section, with the main beam 5'.

The base end of a support arm 380 is pivotally attached to the lower portions of both the front and rear sides of the support arm 38 by a horizontal shaft 39 extending in the left-right direction, and a wheel 40 is attached to the tip of the support arm 38. is rotated by a worm gear mechanism rotated by a rotary actuator or motor, or by a hydraulic jack or screw jack (not shown) connecting the intermediate part of the support arm 38 and the main beams 5', 6'. By adjusting the angles of the front and rear support arms, the inclination angles of the main beams 5' and 6' can be adjusted. In between, there are provided foldable road slabs 1', 2' and a left/right expansion/contraction mechanism similar to those in the previous embodiment.

When expanding the folded portable temporary road in the approach section, for example, one main beam is supported by a temporary trolley that can run in the left and right directions, and the horizontal expansion jack 10 and the vertical expansion jack ( (not shown) is extended to form the main beam 5'.

What is necessary is to expand the interval between 6' to the maximum, unfold the foldable temporary road slab 4', and then remove the temporary trolley.

According to this invention, by simply operating the vertical expansion jack 8 and the horizontal expansion jack 10 in the expansion direction, the left and right main beams 5°6 can be moved laterally in directions that are relatively apart from each other using a simple mechanism. Along with moving, foldable temporary road version 4
The temporary road bridge can be expanded easily and quickly by unfolding it horizontally, and by operating the vertical jacks 8 and horizontal jacks 10 in the contraction direction, the foldable temporary road bridge 4 can be expanded almost completely. By folding it vertically and moving each of the main beams 5 and 6 by a line width to a position close to both sides of the folded road board 40, the temporary road bridge can be folded into a significantly narrower width and quickly, and can be folded again. Since the width of the temporary road bridge is extremely small, it can be easily transported.

[Brief explanation of drawings]

Figures 1 to 14 show an embodiment of this invention, in which Figure 1 is a partially longitudinal side view showing a portable temporary road bridge being transported to a predetermined position on the road bridge, The figure is a partially longitudinal front view, Figure 3 is a partially longitudinal side view showing an enlarged view of the second part of Figure 1, Figure 4 is a plan view of the part shown in Figure 3, and Figure 5 is a temporary road. Figure 6 is a front view with a partial longitudinal section showing the bridge in its expanded state, Figure 6 is a front view of the temporary road bridge with the construction completed, Figure 7 is a partially cutaway plan view, and Figure 8 is an enlarged view. A plan view showing the expansion mechanism using the horizontal opening jack, FIG. 9 is an enlarged plan view showing the expansion mechanism in a minimized state, and FIG. 10 is an enlarged plan view showing the expansion mechanism in a state expanded to the maximum. Fig. 11 is an enlarged plan view showing the state in which the expansion mechanism using the vertical expansion jack is minimized, and Fig. 12 is a front view showing the expansion mechanism expanded to the maximum extent. FIG. 13 is a schematic plan view showing the approach section with a portable temporary road bridge added thereto, and FIG. 14 is a schematic side view thereof. FIG. 15 is a plan view showing the portable temporary road bridge in the approach section, FIG. 16 is a side view thereof, and FIG. 17 is an enlarged front view thereof. In the figure, 1 and 2 are road plates, 3 is a horizontal axis, 4 is a foldable temporary road plate, 5 and 6 are portable main beams, and 7
is a horizontal axis, 8 is a vertical jack for expansion, 9 is a link, 10 is a horizontal jack for expansion, 11 is a metal road surface plate, 12 is a metal horizontal rib, 21 is a telescopic support leg, 23 is a front truck, 24 is the rear truck, 25 is the bolt, 29 is the trailer, 32 is the road bridge,
33 is a bolt, 34 is a bolt or pin, and 37 is a place.

Claims (1)

[Scope of utility model registration request] A foldable temporary road slab 4 is arranged between the left and right main beams 5 and 6, and is constructed by pivoting the inner ends of the left and right road slabs 1 and 2 by a horizontal shaft 3 extending in the front-rear direction. 1,
The outer ends of the road slabs 1, 2 are pivotally connected to the upper portions of the portable main beams 5, 6 by horizontal shafts 7 extending in the front and rear direction.
and the lower part of the main beam 5.6 are connected via a vertical expansion jack 8, and the front lower part and the rear lower part of each main beam 5, 6 have left and right parts whose inner ends are pivoted to each other. 1
A portable % type % characterized in that the outer ends of the pair of links 9 are connected, and the link 9 and the main beams 1 and 2 are connected via a horizontal expansion jack 10.